The invention discloses an amplitude modulation wireless microphone for a computer. The amplitude modulation wireless microphone comprises a power supply, a switch, a first resistor to a twelfth resistor, a first capacitor to a ninth capacitor, an antenna, a first inductor, a second inductor, a first triode to a fourth triode, a potentiometer and an electret microphone, wherein the second triode, the second inductor, the third inductor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the fourth resistor, the fifth resistor and the seventh resistor form a common-base capacitance three-point oscillator, an oscillation signal transmitted by the common-base capacitance three-point oscillator is used as a carrier signal, an audio signal is used as a modulation signal, and finally an amplitude modulation signal is connected with the antenna through a matching network consisting of the second capacitor, the first inductor and the second resistor and transmitted to the space through the antenna. A be node of the first triode has a nonlinear character, so that the amplitude modulation of the audio signal for the carrier signal can be realized, the interference resistance of the wireless microphone can be improved, the potentiometer is used for adjusting the modulation signal, and the excessive amplitude modulation can be prevented.